First and second light-emitting elements having identical peak emission intensities

Abstract

A light source apparatus includes a first light-emitting element to generate an illumination light with a first light emission intensity to be applied to a subject, and a second light-emitting element to generate an illumination light with a second light emission intensity, including at least light with a wavelength different from the illumination light generated from the first light-emitting element. The first light-emitting element and second light-emitting element are arranged, so that the peaks of the first emission intensity and second emission intensity become identical.

What is claimed is: 
     
       1. A light source apparatus comprising:
 a plurality of first light-emitting elements which emit a first illumination light including a light with a first wavelength to be applied to a subject, and which are located in a position at a first distance from an image-pickup element; and 
 a plurality of second light-emitting elements which emit at least a second illumination light including a light with a second wavelength that is different from the first wavelength of the light included in the first illumination light emitted from the first light-emitting elements, and which are located in a position at a second distance, different from the first distance, from the image-pickup element, 
 wherein the respective light-emitting elements have light emission intensities that vary so that a peak portion of a first light emission intensity obtained by combining the first illumination lights emitted from the plurality of first light-emitting elements in a direction parallel to a surface direction, in which the plurality of first light-emitting elements and the plurality of second light-emitting elements are arranged, coincides with a peak portion of a second light emission intensity obtained by combining the second illumination lights emitted from the plurality of second light-emitting elements in a direction parallel to the surface direction in an angle of view of the image pickup element. 
 
     
     
       2. The light source apparatus of  claim 1 , wherein the plurality of first light-emitting elements and the plurality of second light-emitting elements are arranged and emit light so that the peak portion of the first light emission intensity and the peak portion of the second light emission intensity coincide with a center of the image pickup element which picks up the image of the subject. 
     
     
       3. A light source apparatus comprising:
 a plurality of first light-emitting elements which emit a first illumination light including a light with a first wavelength to be applied to a subject, and which are located in a position at a first distance from an image-pickup element; and 
 a plurality of second light-emitting elements which emit at least a second illumination light including a light with a second wavelength that is different from the first wavelength of the light included in the first illumination light emitted from the first light-emitting elements, and which are located in a position at a second distance, different from the first distance, from the image-pickup element which picks up an image of the subject on a plane identical to that of the plurality of first light-emitting elements, 
 wherein the respective light-emitting elements have light emission intensities that vary so that a peak portion of a first light emission intensity obtained by combining the first illumination lights emitted from the plurality of first light-emitting elements in a direction parallel to a surface direction, in which the plurality of first light-emitting elements and the plurality of second light-emitting elements are arranged, coincides with a peak portion of a second light emission intensity obtained by combining the second illumination lights emitted from the plurality of second light-emitting elements in a direction parallel to the surface direction in a position on the plane. 
 
     
     
       4. The light source apparatus of  claim 3 , wherein the plurality of first light-emitting elements and the plurality of second light-emitting elements are arranged and emit light so that the peak portion of the first light emission intensity and the peak portion of the second light emission intensity coincide with a center of the image pickup element which picks up the image of the subject. 
     
     
       5. A light source apparatus comprising:
 a plurality of first light-emitting elements which emit a first illumination light including a light with a first wavelength to be applied to a subject; 
 a plurality of second light-emitting elements which emit at least a second illumination light including a light with a second wavelength that is different from the first wavelength of the light included in the first illumination light emitted from the first light-emitting elements; and 
 a control unit which controls amounts of lights emitted from the plurality of first light-emitting elements and the plurality of second light-emitting elements so that a peak portion of a first light emission intensity obtained by combining the first illumination lights emitted from the plurality of first light-emitting elements coincides with a peak portion of a second light emission intensity obtained by combining the second illumination lights emitted from the plurality of second light-emitting elements, 
 wherein each of the plurality of first light-emitting elements and the plurality of second light-emitting elements has a plurality of peak portions in a direction parallel to a surface direction in which the light-emitting elements are arranged, and the plurality of first light-emitting elements and the plurality of second light-emitting elements are located in positions at different distances from an image-pickup element which picks up an image of the subject, and 
 the control unit controls the amounts of lights emitted from the plurality of first light-emitting elements and the plurality of second light-emitting elements so that the peak portion of the first light emission intensity obtained by combining the first illumination lights emitted from the plurality of first light-emitting elements coincides with the peak portion of the second light emission intensity obtained by combining the second illumination lights emitted from the plurality of second light-emitting elements in an angle of view of the image pickup element. 
 
     
     
       6. The light source apparatus of  claim 5 , wherein the control unit performs one of control of adjusting an amount of light of one light-emitting element in association with an amount of light of another light emitting element and control of independently adjusting an amount of light of one light-emitting element and an amount of light of another light-emitting element.